Volcanoes: Prediction and Mitigation. Outline Mt. St. Helens Long Valley, 1982 Mt. Pinatubo, 1991.

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Presentation transcript:

Volcanoes: Prediction and Mitigation

Outline Mt. St. Helens Long Valley, 1982 Mt. Pinatubo, 1991

Pre-1980 Eruption Activity - Mt. St. Helens Small earthquakes Rising bulge on north side Occurred for months pre-eruption

Current Monitoring at Mt. St. Helens seismology DomeCam gas

Long Valley, 1982 May 1980 –Series of large earthquakes (some magnitude 6) in area more earthquakes, evidence of magma rising

Long Valley

Long Valley Warnings U.S. Geological Survey issued warning in May, 1982 –Lowest level of alert –House prices dropped 40% immediately –Tourism in ski area dropped No eruption 1990’s, more earthquakes, gas emissions –No warning issued

Mt. Pinatubo

Mt. Pinatubo, Philippines Success for prediction of VEI 6 eruption Video Bottom line: 300 deaths, $1.5million monitoring –Saved ~20,000 people, $500 million in evacuated property